ST485AD 데이터 시트보기 (PDF) - STMicroelectronics

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ST485AD

LOW POWER RS-485/RS-422 TRANSCEIVER

STMicroelectronics 

ST485

LOW POWER

RS-485/RS-422 TRANSCEIVER

s LOW QUIESCENT CURRENT: 300µA

s DESIGNED FOR RS-485 INTERFACE

APPLICATIONS

s -7V TO 12V COMMON MODE INPUT

VOLTAGE RANGE

s DRIVER MAINTAINS HIGH IMPEDANCE IN

3-STATE OR WITH THE POWER OFF

s 70mV TYPICAL INPUT HYSTERESIS

s 30ns PROPAGATION DELAYS, 5ns SKEW

s OPERATE FROM A SINGLE 5V SUPPLY

s CURRENT LIMITING AND THERMAL

SHUTDOWN FOR DRIVER OVERLOAD

PROTECTION

s ALLOWS UP TO 64 TRANSCEIVERS ON

THE BUS

DESCRIPTION

The ST485 is al low power transceiver for RS-485

and RS-422 communication. Each part contains

one driver and one receiver.

This transceiver draw 300µA (typ.) of supply

current when unloaded or fully loaded with

disabled drivers.

DIP

SOP

It operates from a single 5V supply.

Driver is short-circuit current limited and is

protected against excessive power dissipation by

thermal shutdown circuitry that placed the driver

outputs into a high-impedance state. .

The ST485 is designed for bi-directional data

communications on multipoint bus transmission

line (half-duplex applciations).

ORDERING CODES

Type

ST485CN

ST485BN

ST485AN

ST485CD

ST485BN

ST485AD

ST485CDR

ST485BDR

ST485ADR

Temperature

Range

0 to 70 °C

-40 to 85 °C

-55 to 125 °C

0 to 70 °C

-40 to 85 °C

-55 to 125 °C

0 to 70 °C

-40 to 85 °C

-55 to 125 °C

Package

DIP-8

DIP-8

DIP-8

SO-8 (Tube)

DIP-8

SO-8 (Tube)

SO-8 (Tape & Reel)

SO-8 (Tape & Reel)

SO-8 (Tape & Reel)

Comments

50parts per tube / 40tube per box

50parts per tube / 40tube per box

50parts per tube / 40tube per box

100parts per tube / 20tube per box

50parts per tube / 40tube per box

100parts per tube / 20tube per box

2500 parts per reel

2500 parts per reel

2500 parts per reel

March 2002

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